Three schools were randomized to the intervention/treatment condition and three schools to a minimal intervention/comparison condition. Social Cognitive Theory and ecological theory provided the theoretical basis for the multi-component intervention, which included 1) a classroom-based experiential curriculum that incorporated school, family and community-linked activities to promote physical activity, healthy eating and limited television viewing, 2) environmental modifications of food and beverage offerings and physical activity opportunities at school and 3) a teacher-guided, youth-directed health advisory council to promote and support physical activity, healthy eating and limited television viewing.